CN102642919A - Application of hollow glass bead biological membrane carrier in wastewater treatment - Google Patents
Application of hollow glass bead biological membrane carrier in wastewater treatment Download PDFInfo
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- CN102642919A CN102642919A CN2012101340694A CN201210134069A CN102642919A CN 102642919 A CN102642919 A CN 102642919A CN 2012101340694 A CN2012101340694 A CN 2012101340694A CN 201210134069 A CN201210134069 A CN 201210134069A CN 102642919 A CN102642919 A CN 102642919A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses application of a hollow glass bead biological membrane carrier in wastewater treatment, which includes that a hollow glass bead is added in a biological membrane reactor for inoculating active sludge, the biological membrane reactor is started to intake water and aerate so as to enable the hollow glass bead to contact with microorganisms in the biological membrane reactor fully, a biological membrane is generated on the surface of the hollow glass bead, and the biological membrane is used for perform wastewater treatment. The weight of a single hollow glass bead is less than 0.001g, grain size of the single hollow glass bead is 0.01-0.075mm, and density of the single hollow glass bead is 180-190Kg.m-3. The hollow glass bead biological membrane carrier is light in weight, small in grain size and density, stable in chemical property and high in mechanical strength, has good sealing performance, wind pressure resistance and corrosion resistance, is not easy to break and good in mobility, can form a turbulence state with the microorganisms, simultaneously can resist strong hydraulic shear action, facilitates the wastewater treatment, and accelerates forming speed of the biological membrane and starting time of the reactor.
Description
(1) technical field
The present invention relates to a kind of application of hollow glass microbead, the application of particularly a kind of hollow glass microbead biofilm carrier in wastewater treatment.
(2) background technology
Along with the maturation gradually of biological wastewater treatment technology, treatment processs such as microbial film facture, activated sludge process are widely used in the wastewater treatment.Wherein the microbial film waste water treatment process is a kind of sewage aerobic biologic treating technique arranged side by side with activated sludge process.The essence of this facture is that the microfauna of one type of the mikrobe that makes bacterium and Mycophyta, protozoon and metazoan is attached to growth reproduction on filler or some carrier and form membranaceous biological sludge-microbial film above that.And in the microbial film waste water treatment process most critical be biomembranous formation and renewal.
Along with the continuous development of technology of biological membrane, used carrier develops to the light carrier direction from originally pebbles gradually.Drawing materials of biofilm carrier is not inorganic materials, organic materials merely simultaneously, and develops to the matrix material direction.Carrier commonly used or filler material comprise organic and inorganic two big types.Wherein mineral-type mainly contains: sand, carbonate, glass material, zeolite, pottery, thomel, slag, gac etc., the characteristics of above-mentioned inorganic carrier: physical strength is high, chemical property is relatively stable, specific surface area is big etc.Shortcoming is: carrier proportion is bigger, is unfavorable in fluidized biofilm reactors such as fluidized-bed, turbulent bed, using, is prone to obstruction, the difficult problem of recycling of carrier.
Organic type of carrier is mainly: PVC, PE, PS, PP, various types of resins, plastics, fiber, porous material etc.Though these materials respectively have characteristics, there are many shortcomings when the wastewater treatment carrier, higher like cost, complete processing is complicated, filler is with the solid waste difficult treatment that useless back forms, the also easy generation of secondary pollution that has, harm environment.
(3) summary of the invention
The problem that the present invention is prone in handling according to microbial film, and biomembrane process provides the application of a kind of hollow glass microbead biofilm carrier in wastewater treatment to the requirement of carrier, for wastewater treatment provides a kind of new biofilm carrier.
The technical scheme that the present invention adopts is:
The application of a kind of hollow glass microbead biofilm carrier in wastewater treatment; Described being applied as: hollow glass microbead is added in the biofilm reactor of inoculation of activated-sludge; Start biofilm reactor water inlet and aeration; Hollow glass microbead is fully contacted with mikrobe in the biofilm reactor, generate microbial film, utilize microbial film to carry out the processing of waste water on the hollow glass microbead surface; Said hollow glass microbead is the airtight spherical shape of a kind of small hollow, ultralight matter, Powdered packing material.
Further, single quality＜0.0001g of preferred described hollow glass microbead, particle diameter 0.01～0.075mm, density are 180～190kgm
-3, promptly be preferably Guangzhou million and lead to the hollow glass microbead of 2018 models of glass microballon firms.
Further; Total add-on of said hollow glass microbead is less than 10% of reactor drum effective volume; The addition of common said hollow glass microbead is to add according to the effective volume of reactor drum, and the total addition level of said hollow glass microbead is counted 100～150g/L with the reactor drum effective volume.
Further, the application of said hollow glass microbead microbial film in wastewater treatment recommended to carry out as follows:
(1) active sludge in the gas stripping type reactor drum of steady running is inoculated in the aerobic biofilm reactor, the active sludge inoculum size accounts for 5～10% of reactor drum effective volume;
(2) serve as the reaction water inlet with nitrogenous simulated wastewater, start aerobic biofilm reactor, in water inlet and aeration; Add hollow glass microbead, influent ammonium concentration is 70mg/L, and hydraulic detention time is 24h; Behind the hollow glass microbead surface attachment microbial film; Stride with 7～28mg/L increases influent ammonium concentration, carries out the processing of waste water, and the method for said biological membrane wastewater treatment is a technology well known in the art; Single quality＜0.001g of said hollow glass microbead, particle diameter 0.01～0.075mm, density are 180～190Kgm
-3, preferred said hollow glass microbead is the hollow glass microbead of 2018 models of Guangzhou million logical glass microballon firms, total add-on of said hollow glass microbead is counted 100～150g/L with the reactor drum effective volume.
Further; Said hollow glass microbead adds with the feed supplement mode; Promptly in reactor drum, add for the first time said hollow glass microbead and count 20～24g/L with the reactor drum effective volume, along with the operation of biofilm reactor, the said hollow glass microbead of part can come off because of sluicing and biomembranous aging; The said hollow glass microbead amount in the system that makes reduces gradually; For guaranteeing the treatment effect of reactor drum, need constantly in reactor drum, to add described hollow glass microbead, addition adds according to actual waste water treatment capacity and reactor drum effective volume size; When the reactor drum effluent quality obviously worsens; Be water outlet ammonia-nitrogen content during, in reactor drum, add said hollow glass microbead apparently higher than 5mg/L, the maximum first addition of said hollow glass microbead and handle that relation is 15～20g/L between the waste water water yield; The each maximum additional amount of said hollow glass microbead is counted 8～10g/L with the reactor drum effective volume, and the total addition level of said hollow glass microbead is counted 100～150g/L with the effective volume of reactor drum; If biofilm system collapse phenomenons such as film comes off entirely appear in reactor drum; Be that the microbial film water treatment effect significantly reduces; The effluent quality index can't satisfy GB (GB1891-2002) requirement, and (wherein total nitrogen content should be lower than 15mg/L; Ammonia-nitrogen content is lower than 5mg/L) time, need add hollow glass microbead again, addition and the identical or border situation interpolation as one sees fit factually of add-on 20～24g/L for the first time; Add new hollow glass microbead again after also can part hollow glass microbead in the reactor drum being taken out, make its maximum addition count 100～150g/L with the effective volume of reactor drum.
Further, hollow glass microbead of the present invention can be handled all kinds of waste water that are applicable to biofilm reactor, and it is simulated wastewater that the present invention adopts nitrogenous effluent, the consisting of of said nitrogenous simulated wastewater: (NH
4)
2SO
4Be (2.5～3.8) mgL
-1And NaHCO
3Be (4.1～6.1) mgL
-1, KH
2PO
4Be (25～30) mgL
-1, CaCl
22H
2O is (135～140) mg/L, MgSO
47H
2O is that (298～303) mg/L and the micro-I that keeps microorganism growth are that 1.25mL/L, micro-II are 1.25mL/L; Said micro-I is EDTA (4990～5010) mg/L, FeSO
47H
2O (9135～9145) mg/L, micro-II are EDTA (14980～15010) mg/L, H
3BO
4(13～18) mg/L, MnCl
24H
2O (980～1000) mg/L, CuSO
45H
2O (245～255) mg/L, ZnSO
47H
2O (420～435) mg/L, NiCl
26H
2O (200～220) mg/L, NaMoO
42H
2O (210～225) mg/L, NaSeO
410H
2O (200～215) mg/L.
Reactor drum according to the invention is hung the successful detection method of film and comprised: whether successful (1) monitoring effluent quality index as extension film sign; Promptly after microbial film is hung the film success, the desired value that respectively characterizes pollutent in the reactor drum water outlet comparatively significantly is lower than the desired value of pollutent in the water into; (2) also can have or not mud to come off and intuitively whether hung the film success through range estimation reactor drum water outlet place; (3) also can through the film thickness on the carrier in the assaying reaction device (being hollow glass microbead) (carrier surface does not have thickness before hanging film, hang film after, thickness increased before the carrier surface thickness was hung film; (4) can pass through formed microbe species of sediments microscope inspection biofilm surface and biomembranous structure, if there is a large amount of wheel animalcules to occur, then stable effluent quality is explained and is hung the film maturation; (5) observing biomembranous color by biofilm surface, explain and hangs film successfully excessively the time to golden yellow to creamy white by initial white.
Hollow glass microbead according to the invention is that a kind of naked eyes look very small, inner be full of gas such as carbonic acid gas, hollow closure, the rough-shape spherical shape powder in surface, particle diameter is between 1～500 μ m, density is at 0.1～0.3g/m
3Between, have that the light weight specific surface area is big, thermal conductivity is low, ultimate compression strength is high, the advantage of dispersed, mobile, good stability.In addition, also have self-lubricating, corrosion-resistant, anti-blast, excellent properties such as nontoxic, can replace the packing material of part copper bronze, molybdenumdisulphide and WHITE CARBON BLACK etc.Said hollow glass microbead is made up of inorganic materials, and its chemical constitution is silicon-dioxide, aluminum oxide, zirconium white, Natural manganese dioxide, water glass etc.The preparation method of said hollow glass microbead is a technique known.
The hollow glass microbead of employing preferred for this invention is a hollow glass microbead of taking from 2018 models of Guangzhou million logical glass microballon firms.The concrete physical properties of used hollow glass microbead is following among the present invention: (single carrier quality approximately＜0.0001g), particle diameter 0.01～0.075mm, density be 180～190kgm for light weight
-3, surface property (Hollow Glass Sphere is shaggy spherical shape), physical strength higher (good sealing property, anti-blast, corrosion-resistant, be difficult for breaking), chemicalstability (to strengthen the glass carrier, the chemicalstability that form good for simple glass).
Hollow glass microbead of the present invention is following as the characteristic of biofilm carrier:
1) in general, biofilm reactor needs the long time from starting to steady running.Contact absorption for pollutants in waste water can within a short period of time be accomplished with biomembranous, need carry out stirring in various degree usually, this stirring will produce very intensive hydraulic shear effect.The experimental results shows: biomembranous solid support material must have enough physical strengths, to resist the effect of this intensive hydraulic shear, prevents that carrier is broken in motion, collision process.And hollow glass microbead is suitable for biofilm carrier because of itself having excellent mechanical intensity (good sealing property, anti-blast, corrosion-resistant, be difficult for breaking).
2) surfaceness is considered to a great extent influence that mikrobe adheres at carrier surface, important factor of fixed.This be because: one, compare with smooth surface, coarse carrier surface has increased the effective contact area between mikrobe and carrier; Two, be preferential coarse part for avoiding washing away of hydraulic shear effect, microbial total, like recess, slit etc. attached to carrier surface.Therefore, the carrier surface roughness is big more, and the mikrobe that adheres to is just many more.Hollow glass microbead is the tiny spherical shape powder that cutting is become after processing because of its material is a glass, and its appearance is coarse but not smooth as the simple glass, therefore helps microorganic adhesion, is easy to hang film and film difficult drop-off.
During 3) as biofilm carrier, the quality of used carrier also influences the treatment effect of membrane bioreactor to a certain extent.Hollow glass microbead among the present invention since the general carrier of its quality light (single quality approximately＜0.0001g), density is 180～190kgm
-3, be easy in the biofilm reactor of fluidized such as fluidized-bed, turbulent bed, easily with mikrobe formation turbulence state.And in processing such as coming off of microbial film later stage, also be easy to recycling.Because of its light weight,, come off after not existing microbial film aging and cause secondary pollution problem even if the situation that in microbial film is handled, exists carrier to run off with water outlet also is prone to solve (can be back in the membrane bioreactor through the follow-up settling tank of membrane bioreactor).And carrier can reuse, and economic benefit is also higher.
4) hollow glass microbead is to be processed from strand by simple glass, and its composition is the same with simple glass, mainly is silicate (Na
2SiO
3, CaSiO
3, SiO
2Or Na
2OCaO6SiO
2Deng), and elements such as sodium, calcium are the necessary nutritive element of microorganism growth, so be used for biological wastewater treatment with hollow glass microbead as biofilm carrier mikrobe are had no side effect.
5) because hollow glass microbead is small ball, in liquid, have good mobility, be easy to the mikrobe contact, thereby accelerate biomembranous formation and replace speed, be beneficial to the biological treatment of waste water than sheet, needle-like or erose packing material.
To sum up: hollow glass microbead has the function as biofilm carrier, and its range of application is expanded to the biological wastewater treatment field from general construction timber.
Compared with prior art; Beneficial effect of the present invention is mainly reflected in: hollow glass microbead biofilm carrier light weight according to the invention, particle diameter and density is less, stable chemical performance, physical strength high; Have good sealing property, anti-blast, corrosion-resistant, be difficult for breaking; Good fluidity can form the turbulence state with mikrobe, resists the effect of intensive hydraulic shear simultaneously; Hollow glass microbead biofilm carrier surface irregularity is convenient to microorganic adhesion, makes the microbial film difficult drop-off, helps the processing of waste water; Because microbial film is prone to adhere to, and, quickened the start time of biomembranous formation speed and reactor drum owing to hollow glass microbead light weight and easy and descending current and ascending gas formation turbulence fluidized state on hollow glass microbead.
(4) description of drawings
Fig. 1 is the SBR aerobic biofilm reactor structural representation that this test is used, wherein 1 be the water-in while also as the material-feeding port of follow-up hollow glass microbead, 2 is water outlet, 3 is aerating apparatus.
(5) embodiment
Below in conjunction with specific embodiment the present invention is described further, but protection scope of the present invention is not limited in this:
The present invention adopts SBR aerobic biofilm reactor (as shown in Figure 1), and said reactor drum is processed by synthetic glass, TV 5L, and effective volume 2.5L, whole reactor is fluidized state; Said reactor bottom has water outlet 2 and aerating apparatus 3, and water-in 1 is arranged at the top, and said aerating apparatus 3 is placed in the reactor body through outside aerating system.Wherein the running time of sbr reactor device is following: a circulation is 8 hours, comprising: intake 360 minutes; Aeration 440 minutes; Precipitate 15 minutes; Draining 25 minutes.
1) the extension film of biofilm reactor
Respectively the active sludge in the gas stripping type reactor drum of laboratory steady running is inoculated in two configurations and all identical aerobic biofilm reactor R of reactor drum size
1, R
2In (shown in Figure 1), R wherein
1, R
2The active mud content of middle inoculation is identical, and the seed sludge volume is 1.5L, wherein R
1(its profile is fibrous, is a kind of film with supporting role, and its physical parameter is: internal diameter 0.4mm, external diameter 0.8mm, membrane pore size 0.2 * 10 as biofilm carrier to add the polyethersulfone hollow-fibre membrane in the aerobic biofilm reactor
-3Mm, porosity 80%, film total area 0.36m
2, manufacturer: Shanghai is grasped strange Chemical Industry Science Co., Ltd and is provided); R
2Adding carrier in the reactor drum is that (its parameter condition is: single the about 0.001g of quality, particle diameter 0.01～0.075mm, density are 180～190Kgm to described hollow glass microbead
-3, manufacturer: 2018 type products of Guangzhou million logical glass microballon firms).
Consisting of of nitrogenous simulated wastewater: (NH
4)
2SO
4Be 3mgL
-1And NaHCO
3Be 3.8mgL
-1, KH
2PO
4Be 27mgL
-1, CaCl
22H
2O is 136mg/L, MgSO
47H
2O is that 300mg/L and the micro-I that keeps microorganism growth are that 1.25mL/L, micro-II are 1.25mL/L; Said micro-I is that EDTA is 5000mg/L, FeSO
47H
2O is 9140mg/L, and micro-II is that EDTA is 15000mg/L, H
3BO
4Be 14mg/L, MnCl
24H
2O is 990mg/L, CuSO
45H
2O is 250mg/L, ZnSO
47H
2O is 430mg/L, NiCl
26H
2O is 210mg/L, NaMoO
42H
2O is 220mg/L, NaSeO
410H
2O is 210mg/L.
With above-mentioned nitrogenous simulated wastewater is the reactor drum water inlet, carries out aeration by reactor drum outside aerating system, opens water inlet, with 0.8～1.0m
3The speed aeration of/h, simultaneously from the water-in 1 of reactor drum to aerobic biofilm reactor R
1The middle polyethersulfone hollow-fibre membrane 20g that adds is to aerobic biofilm reactor R
2Water-in 1 in add said hollow glass microbead 20g, influent ammonium concentration is respectively 70mg/L, hydraulic detention time is respectively 24h, carries out the extension film of biofilm reactor, aerobic biofilm reactor R
1, R
2After moving 15 days, 10 days respectively, the faint yellow microbial film of one deck is all adhered on polyethersulfone hollow-fibre membrane and hollow glass microbead surface, shows aerobic biofilm reactor R
1, R
2The success of extension film.
2) startup of biofilm reactor
After aerobic biofilm reactor is hung the film success, with 0.8～1.0m
3The speed of/h keeps influent ammonium concentration to be 70mg/L to two reactor drum aerations simultaneously, and hydraulic detention time (HRT) is 24h; Measure effluent quality every day; When water outlet ammonia nitrogen amount is lower than 5mg/L, keep HRT constant, increase influent ammonium concentration and make that ammonia nitrogen loading increases in the reactor drum; Influent ammonium concentration increases with the 28mg/L stride, measures effluent quality every day.As aerobic biofilm reactor R
1Or aerobic biofilm reactor R
2The denitrification percent of water outlet is lower than at 50% o'clock, respectively from water-in 1 to reactor system R
1The middle polyethersulfone tubular fibre that adds; R
2The middle hollow glass microbead that adds is added the maximum of carrier (polyethersulfone hollow-fibre membrane or hollow glass microbead) at every turn and is counted 8～10g/L with the reactor drum effective volume, and the total add-on of said carrier is counted 80g/L with the reactor drum effective volume.After carrier (polyethersulfone hollow-fibre membrane or hollow glass microbead) was added completion, reactor drum continued operation, measures effluent quality simultaneously.When the influent ammonium concentration of two reactor drums all reaches 350mg/L, the reactor drum nitric efficiency of mensuration, the result is: reactor drum R
1Denitrification percent from initial 10% be increased to end of run 70% and keep constant; Reactor drum R
2Denitrification percent reaches 88.4% and keep constantly from initial 10%, shows that bigger difference appears in the denitrification percent when adding polyethersulfone tubular fibre carrier and adding said hollow glass microbead, and the nitric efficiency of hollow glass microbead is better.
With real life sewage is the biofilm reactor water inlet; Each parameter of intaking is: (COD600mg/L, SS 150mg/L, pH 6～8); In biofilm reactor, add said hollow glass microbead; Biofilm reactor configuration and the operation of extension membrane process are with embodiment 1, and after the success of extension film, aeration speed is 0.8～1.0m
3/ h, (also can carry out the size adjustment according to actual needs, adjusting range is 1 with relation between flooding velocity: (7.7～8.5) m
3/ h; Hydraulic detention time is 5h; The operation biofilm reactor, owing to microbial film is prone to adhere on hollow glass microbead, and because hollow glass microbead light weight and easy and descending current and ascending gas formation turbulence fluidized state; Quickened the start time of biomembranous formation speed and reactor drum, made that the living weight that is detained in the reactor drum is many.In the reactor drum operational process; Real-time monitoring effluent quality, when effluent quality be lower than that GB requires (wherein total nitrogen content should be lower than 15mg/L, and ammonia-nitrogen content is lower than 5mg/L; GB GB1891-2002) time or large number of biological film when coming off; Should be immediately add hollow glass microbead from water-in 1, the maximum addition of each hollow glass microbead counts with the reactor drum effective volume that (8～10g/L), the total addition level of said hollow glass microbead is counted 100g/L with the reactor drum effective volume simultaneously.After adding carrier, reactor drum continues to keep operation, and when reactor drum steady running after 30 days, effluent COD concentration is 42mg/L, and water outlet SS amount is 5mg/L, and the COD clearance reaches 93%, and SS removes speed and reaches 96%.
Claims (7)
1. the application of hollow glass microbead biofilm carrier in wastewater treatment; It is characterized in that described being applied as: hollow glass microbead is added in the biofilm reactor of inoculation of activated-sludge; Start biofilm reactor water inlet and aeration; Hollow glass microbead is fully contacted with mikrobe in the biofilm reactor, generate microbial film, utilize microbial film to carry out the processing of waste water on the hollow glass microbead surface; Said hollow glass microbead is a kind of small airtight spherical shape, light weight, Powdered packing material.
2. the application of hollow glass microbead biofilm carrier in wastewater treatment according to claim 1 is characterized in that: single quality＜0.001g of said hollow glass microbead, particle diameter 0.01～0.075mm, density are 180～190Kgm
-3
3. the application of hollow glass microbead biofilm carrier in wastewater treatment according to claim 1 is characterized in that: said hollow glass microbead is the hollow glass microbead of 2018 models of Guangzhou million logical glass microballon firms.
4. the application of hollow glass microbead biofilm carrier in wastewater treatment according to claim 1 is characterized in that: total dosage of said hollow glass microbead is counted 100～150g/L with the reactor drum effective volume.
5. the application of hollow glass microbead biofilm carrier in wastewater treatment according to claim 1, it is characterized in that: described application is carried out as follows:
(1) active sludge in the gas stripping type reactor drum of steady running is inoculated in the aerobic biofilm reactor, active mud content accounts for 5～10% of reactor drum effective volume;
(2) serve as the reaction water inlet with nitrogenous simulated wastewater, start aerobic biofilm reactor, in water inlet and aeration; Add hollow glass microbead; Influent ammonium concentration is 70mg/L, and hydraulic detention time is 24h, behind the hollow glass microbead surface attachment microbial film; Stride with 7～28mg/L increases influent ammonium concentration, carries out the processing of waste water; Said hollow glass microbead is the hollow glass microbead of 2018 models of Guangzhou million logical glass microballon firms, and total dosage of said hollow glass microbead is counted 100～150g/L with the reactor drum effective volume.
6. like claim 4 or 5 application of said hollow glass microbead biofilm carrier in wastewater treatment; It is characterized in that: said hollow glass microbead adds with the feed supplement mode; In biofilm reactor, add said hollow glass microbead for the first time and count 20～24g/L with the effective volume of reactor drum; When total nitric efficiency of reactor drum water outlet is lower than 50%; In reactor drum, add said hollow glass microbead, the single additional amount of said hollow glass microbead is counted 8～10g/L with the effective volume of reactor drum, and the interpolation total amount of said hollow glass microbead is counted 100～150g/L with the effective volume of reactor drum.
7. like the application of the said hollow glass microbead biofilm carrier of claim 5 in wastewater treatment, it is characterized in that: the consisting of of said nitrogenous simulated wastewater: (NH
4)
2SO
4Be 2.5～3.8mgL
-1And NaHCO
3Be 4.1～6.1mgL
-1, KH
2PO
4Be 25～30mgL
-1, CaCl
22H
2O is 135～140mg/L, MgSO
47H
2O is that 298～303mg/L and the micro-I that keeps microorganism growth are that 1.25mL/L, micro-II are 1.25mL/L; Said micro-I is EDTA 4990～5010mg/L, FeSO
47H
2O 9135～9145mg/L, micro-II are EDTA 14980～15010mg/L, H
3BO
413～18mg/L, MnCl
24H
2O 980～1000mg/L, CuSO
45H
2O245～255mg/L, ZnSO
47H
2O 420～435mg/L, NiCl
26H
2O 200～220mg/L, NaMoO
42H
2O 210～225mg/L, NaSeO
410H
2O 200～215mg/L.
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| CN102976479A (en) * | 2012-12-27 | 2013-03-20 | 净化控股集团有限公司 | Honeycombed suspension ball filler |
| CN103196781A (en) * | 2013-04-15 | 2013-07-10 | 杭州师范大学 | Measuring method and device for mechanical strength of granular sludge |
| CN103601333A (en) * | 2013-10-12 | 2014-02-26 | 海门申浩生态农业有限公司 | Processing system and processing method for high concentration sewage in pig farm |
| CN105330023A (en) * | 2015-12-01 | 2016-02-17 | 杭州师范大学 | Integration automatic flow type biological nitrogen and sulfur removal reactor |
| CN106350567A (en) * | 2016-08-25 | 2017-01-25 | 农业部沼气科学研究所 | Method for promoting starting of anaerobic digestor and accelerating conversion of propionic acid into methane |
| CN106434824A (en) * | 2016-08-25 | 2017-02-22 | 农业部沼气科学研究所 | Propionic acid removing method for rapid recovery of acidification anaerobic digestion system |
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| CN101712835A (en) * | 2008-10-08 | 2010-05-26 | 上海汇丽涂料有限公司 | Heat reflection paint with hollow glass microballoon |
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